Minimal verbose mode

src/Bundler.js

@@ -251,9 +251,7 @@ class Bundler extends EventEmitter {
             this.entryAssets.add(asset);
           } catch (err) {
             throw new Error(
-              `Cannot resolve entry "${entry}" from "${
-                this.options.rootDir
-              }"`
+              `Cannot resolve entry "${entry}" from "${this.options.rootDir}"`
             );
           }
         }
@@ -602,6 +600,8 @@ class Bundler extends EventEmitter {
       }
     });
 
+    logger.verbose(`Built ${asset.relativeName}...`);
+
     if (this.cache && cacheMiss) {
       this.cache.write(asset.name, processed);
     }

src/Logger.js

@@ -6,6 +6,8 @@ const {countBreaks} = require('grapheme-breaker');
 const stripAnsi = require('strip-ansi');
 const ora = require('ora');
 const WorkerFarm = require('./workerfarm/WorkerFarm');
+const path = require('path');
+const fs = require('fs');
 
 class Logger {
   constructor(options) {
@@ -50,6 +52,10 @@ class Logger {
   }
 
   write(message, persistent = false) {
+    if (this.logLevel > 3) {
+      return this.verbose(message);
+    }
+
     if (!persistent) {
       this.lines += this.countLines(message);
     }
@@ -58,6 +64,27 @@ class Logger {
     this._log(message);
   }
 
+  verbose(message) {
+    if (this.logLevel < 4) {
+      return;
+    }
+
+    let currDate = new Date();
+    message = `[${currDate.toLocaleTimeString()}]: ${message}`;
+    if (this.logLevel > 4) {
+      if (!this.logFile) {
+        this.logFile = fs.createWriteStream(
+          path.join(
+            process.cwd(),
+            `parcel-debug-${currDate.toLocaleDateString()}@${currDate.toLocaleTimeString()}.log`
+          )
+        );
+      }
+      this.logFile.write(stripAnsi(message) + '\n');
+    }
+    this._log(message);
+  }
+
   log(message) {
     if (this.logLevel < 3) {
       return;
@@ -103,7 +130,7 @@ class Logger {
   }
 
   clear() {
-    if (!this.color || this.isTest) {
+    if (!this.color || this.isTest || this.logLevel > 3) {
       return;
     }
 
@@ -122,6 +149,10 @@ class Logger {
       return;
     }
 
+    if (this.logLevel > 3) {
+      return this.verbose(message);
+    }
+
     let styledMessage = this.chalk.gray.bold(message);
     if (!this.spinner) {
       this.spinner = ora({

src/cli.js

@@ -58,8 +58,8 @@ program
   .option('-V, --version', 'output the version number')
   .option(
     '--log-level <level>',
-    'set the log level, either "0" (no output), "1" (errors), "2" (warnings + errors) or "3" (all).',
-    /^([0-3])$/
+    'set the log level, either "0" (no output), "1" (errors), "2" (warnings), "3" (info), "4" (verbose) or "5" (debug, creates a log file).',
+    /^([0-5])$/
   )
   .option('--cache-dir <path>', 'set the cache directory. defaults to ".cache"')
   .action(bundle);
@@ -107,8 +107,8 @@ program
   )
   .option(
     '--log-level <level>',
-    'set the log level, either "0" (no output), "1" (errors), "2" (warnings + errors) or "3" (all).',
-    /^([0-3])$/
+    'set the log level, either "0" (no output), "1" (errors), "2" (warnings), "3" (info), "4" (verbose) or "5" (debug, creates a log file).',
+    /^([0-5])$/
   )
   .option('--cache-dir <path>', 'set the cache directory. defaults to ".cache"')
   .action(bundle);
@@ -151,8 +151,8 @@ program
   )
   .option(
     '--log-level <level>',
-    'set the log level, either "0" (no output), "1" (errors), "2" (warnings + errors) or "3" (all).',
-    /^([0-3])$/
+    'set the log level, either "0" (no output), "1" (errors), "2" (warnings), "3" (info), "4" (verbose) or "5" (debug, creates a log file).',
+    /^([0-5])$/
   )
   .option('--cache-dir <path>', 'set the cache directory. defaults to ".cache"')
   .action(bundle);